JP5796801B2 - Dye removal method - Google Patents

Description

  The present invention removes at least the scalp in the vicinity of the hairline, as well as skin stains attached to the hands and skin, when hair is dyed using a hair dye containing an acid dye or an oxidative dye. The present invention relates to a dyeing / removing agent composition and a dyeing / removing method using such a dyeing / removing agent composition.

  Hair dyes containing acid dyes or oxidative dyes are used to dye hair, but when these are used, at least the scalp near the hairline, as well as skin dyeing on the hands and skin. Dirt may adhere. For this reason, a remover (hereinafter referred to as “dye remover”) for removing stains on the skin dye attached to portions other than the hair is required. Various types of dyeing removal agents have been proposed so far.

  For example, Patent Document 1 proposes a dyeing / removing agent containing (A) urea and / or thiourea, and (B) sulfite and / or an alkali component. This dyeing removal agent assumes that the dosage form is liquid, and most conventional dyeing removal agents are liquid.

  In such a liquid dyeing remover, when treating a part of the skin dyed stain (dyed part), a method of rubbing the dyed part after adding the dye removing agent to absorbent cotton or the like is generally used. Has been adopted. However, such a method has a problem in terms of skin irritation because friction occurs between the absorbent cotton and the skin.

  On the other hand, as in Patent Document 2, a dyeing / removing agent having a dosage form in a gel or cream form has also been proposed. In this technique, a reductive decoloring main agent such as thioglycolate, a chelating agent capable of solubilizing the metal contained in the hair dye, and an anti-inflammatory agent are contained. It is a thing. However, such a dyeing removal agent has a problem that it has low permeability and cannot effectively remove the dyeing.

JP-A-8-239309 JP-A-49-81548

  The present invention has been made under such circumstances, and the object thereof is a dyeing remover having the ability to effectively remove the stains of skin dyeing caused by various hair dyes and having little irritation to the skin. It is providing the composition and the method of removing effectively the stain | pollution | contamination of skin dyeing | staining by using such a dyeing removal agent composition.

  The dye removal agent composition of the present invention that has achieved the above object is a dye removal agent composition used for removing stains on skin dyeing when a hair dye is used, It has a gist in that it contains A) a nonionic surfactant and (B) a reducing agent, and is used by being discharged in the form of foam.

  It is also effective to further contain (C) a penetrating agent and (D) an alkali agent, if necessary, in the dyeing / removing agent composition of the present invention.

  On the other hand, the method of the present invention that has achieved the above object has a gist in that the stain of skin dyeing is removed while discharging the above-described dyeing removal composition from the former container in the form of foam.

  According to the present invention, it contains (A) a nonionic surfactant and (B) a reducing agent, and is used by being discharged in the form of foam, so it effectively removes stains on the skin. In addition, there is little friction with respect to the skin or the like during dyeing and removal, and less irritation.

  The inventor has studied from various angles in order to achieve the above object. And at the time of emulsification after dyeing (at the time of washing off), simultaneously using the dyeing remover composition, that is, if the part where the dirt of the skin dyeing exists is kept from coming into contact with the air as much as possible, the dyeing removal is achieved. It turned out to be easy.

  Usually, the hair dyeing is concerned about skin dyeing in most cases. In this gray hair dyeing, a hair dye is often applied from the scalp of the hairline part in order to dye the root part firmly. Then, the scalp near the hairline will be dyed in the same way as the hair, and the dirt must be removed. It was thought that the skin dyed portion of the hair dye is easier to remove as the time of contact with air is shorter, and the idea that it is most desirable to use the dye remover at the same time as washing off the hair dye.

  Most of the dye removing agents proposed so far are liquid. In liquid dosage forms, the hair dye must be washed off and then wiped off with absorbent cotton etc., so it takes a very long time from washing off to using the dye remover, and it takes time and effort to remove the dye. Cannot be performed efficiently. In addition, there are gel-like and cream-like removers, but they are not efficient because they are poorly compatible with hair dyes. On the other hand, the present invention was completed by finding that the most efficient method is to wash off the hair dye at the same time by using the dye remover in a foamy dosage form and to remove the dye at the same time. did.

  The dyeing / removing agent composition of the present invention contains at least (A) a nonionic surfactant and (B) a reducing agent. Each of these components has been conventionally used in cosmetics, but by using those containing these components in a foamy dosage form, an unexpected effect was obtained. The effect by each component (A) and (B) is demonstrated.

  (A) The nonionic surfactant is a component necessary for cleaning the stain of the skin dyeing and generating foam with the former container. Examples of such nonionic surfactants include polyoxyethylene alkyl ether, polyoxyethylene hydrogenated castor oil, alkyl glyceryl ether, fatty acid monoethanolamide, sorbitan fatty acid ester and the like.

  (A) The preferable content of a nonionic surfactant is about 0.3-10.0 mass% in the ratio for the whole dyeing removal agent composition. (A) When the content of the nonionic surfactant is less than 0.3% by mass, the dyeing removal effect is not sufficient. Moreover, even if it becomes more than 10.0 mass%, the effect will be saturated and the effect beyond it cannot be anticipated.

  (B) The reducing agent is a component necessary for removing dirt from skin dyeing. Examples of such a reducing agent include thioglycolic acid, thioglycolates, mercapto compounds such as cysteine, sulfites, thiosulfates, lactone thiols, and other reducing compounds. Of these, sulfites and bisulfites are preferred. The preferable content of the reducing agent is 0.1 to 4.0% by mass. When the blending amount of the component (B) is less than 0.1% by mass, the removal effect is not sufficient. Moreover, even if it exceeds 4.0 mass%, the effect will be saturated and the effect beyond it cannot be anticipated.

  It is also effective to further contain (C) a penetrating agent and (D) an alkali agent, if necessary, in the dyeing / removing agent composition of the present invention. Among these, (C) penetrating agent is an effective component for dissolving the dye dyed on the skin, and exerts an effect of assisting penetration into the skin in addition to the action as a solvent. Examples of such penetrants include alcohols such as benzyl alcohol, ethanol, and propanol, N-methylpyrrolidone, propylene glycol, propylene carbonate, urea, and the like. Of these, ethanol, N-methylpyrrolidone, and benzyl alcohol are preferable. A preferable content of the penetrant is about 1.0 to 7.0% by mass. If the amount is less than 1.0% by mass, the dyeing removal effect becomes weak, and even if the amount exceeds 7.0% by mass, no further effect can be expected.

  (D) The alkaline agent is an effective component for removing stains from skin dyeing. Examples of such alkali agents include organic amines showing alkanolamines such as aqueous ammonia, monoethanolamine, and triethanolamine, and inorganic alkali agents such as sodium hydroxide. Among these, monoethanolamine and triethanolamine are preferable. The preferable content of the alkali agent is about 0.5 to 3.0% by mass. If the amount is less than 0.5% by mass, the effect of removing the dyeing is weakened, and if it exceeds 3.0% by mass, no further effect can be expected, and this is undesirable because it causes irritation to the skin.

  The dyeing / removing agent composition of the present invention is also characterized in that the dosage form is foamy, and a foamer container is used for discharging in foamy form. This former container is a non-aerosol type container, and is used for mixing the dyeing removal agent composition with air and discharging it in the form of foam. Non-aerosol type containers can be reused and can be easily handled because they are inexpensive.

  As the former container, any container can be used as long as it is a non-aerosol type container having a foam discharge function, such as a pump former container or a squeeze foamer container. Since it is effective to be foamed on the skin for a certain time, a pump former is particularly preferable as the former container from the viewpoint of foam retention.

  In addition to the above, the dyeing remover composition of the present invention may contain components (additives) that are usually added to the dyeing remover composition. Examples of such additives include oils such as fats and oils, petrolatum, waxes, moisturizers, surfactants (cationic surfactants, anionic surfactants, amphoteric surfactants), silicones, and the like. , Cationized polymers, thickening / gelling agents, chelating agents, antioxidants, stabilizers, pH adjusting agents, fragrances, pigments, and the like, and these can be appropriately blended.

  EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited by the following examples, but may be appropriately modified within a range that can meet the purpose described above and below. Of course, it is possible to implement them, and they are all included in the technical scope of the present invention.

[Example 1]
Foaming and foam retention when a dyeing / removing agent composition (Formulation Example 1) prepared by blending various raw materials at the blending ratio shown in Table 1 below is foamed with the following former container (or whisk). A comparison was made. We also investigated the ease of use in former containers and whisks.

(1) Former container A: Pump former, manufactured by Daiwa Steel Co., Ltd., mesh roughness (mesh) is 200 mesh for mixing chamber (200 mesh per 1 inch (25.4 mm)), tip 255 mesh (1 inch) (255 squares per 25.4 mm)
(2) Former container B: Pump former, manufactured by Daiwa Steel Co., Ltd., mesh roughness (mesh) is 100 mesh for mixing chamber (100 mesh per 1 inch (25.4 mm)), tip 200 mesh (1 inch) (200 squares per 25.4mm)
(3) Former container C: squeeze foamer, manufactured by Daiwa Steel Co., Ltd., mesh roughness (mesh) is 200 mesh for mixing chamber (200 squares per 1 inch (25.4 mm)), tip 255 mesh (1 inch) (255 squares per 25.4 mm)
(4) Electric whisk: made by Kai Brand, hand mixer

(Bubbling evaluation method and evaluation criteria)
The foaming was visually evaluated.
A: Extremely uniform and fine bubbles ○: Uniform and fine bubbles △: Nonuniform and coarse bubbles ×: Bubbles cannot be cleaned

(Evaluation method and evaluation criteria for foam retention)
The foam was visually evaluated.
◎: Very long lasting, foam lasts for more than 5 minutes after application ○: Sufficient persistence, foam persists for a while after application △: Foam that can be applied is generated, but immediately after application ×: Foam disappears immediately after discharge, causing dripping during application

(Convenience of former container and whisk)
○: Convenient and hassle-free ×: Difficult to use

  The results are shown in Table 2 below.

  As is clear from this result, foaming is good by discharging in a foam form in the former container, and in particular, foaming and foam retention are good in the pump former container. Further, it can be seen that the former container has good convenience during use.

[Example 2]
Commercially available oxidative hair dye [first agent: “Caradeco NB / d-5 / 3” (oxidative hair dye: manufactured by Nakano Seiyaku Co., Ltd.), second agent: “caradeco oxide 06” (hydrogen peroxide oxidizer : Manufactured by Nakano Pharmaceutical Co., Ltd.), the mixing ratio of the first agent and the second agent 1: 1] was applied to the human forearm or upper arm (1 square centimeter, 0.2 g) and left for 30 minutes.

  The dyeing remover composition (Prescription Examples 2 to 5) prepared by blending various raw materials at various blending ratios shown in Table 3 below is (1) foamed with a former container and put on the skin together with the hair dye. Accustomed, 10 strokes with the index finger's belly and swallowing at a certain strength, and (2) Washing the hair dye with water, then impregnating with absorbent cotton and wiping with a certain strength 10 strokes In the case of the treatment, the removal of dyeing and the evaluation of skin irritation were performed. The evaluation method and evaluation criteria at this time are as follows.

(Dyeing removal evaluation method)
Special panelists (10 persons) visually evaluated the remaining state of skin dyeing after the dyeing removal treatment, and the total value was obtained and evaluated according to the following criteria.
3 points: Almost completely removed 2 points: Some color remains 1 point: Almost no color can be removed and color remains

[Evaluation criteria for dyeing removal]
◎: 26-30 points ○: 21-25 points △: 16-20 points ×: 10-15 points

(Skin irritation evaluation method)
About the skin irritation | stimulation after the said dyeing removal process, an expert panelist (10 persons) evaluated by visual observation, calculated | required the total value, and evaluated it with the following reference | standard.
3 points: no redness and the skin condition is the same as before treatment 2 points: some redness is seen 1 point: redness is seen

[Evaluation criteria for skin irritation]
◎: 26-30 points ○: 21-25 points △: 16-20 points ×: 10-15 points

  The results are shown in Table 3 below together with formulation examples and removal methods (Prescription Examples 2 to 5: Removal methods 1 to 7) of the dyeing removal composition.

  As is clear from this result, it can be seen that the ones in which foam removal is performed with a former container (removal methods 1 to 3 and 5 to 7) have high dyeing removal effects and can suppress skin irritation. .

[Example 3]
Apply a commercially available acid hair dye ["Cala de Coacid Color N" (acid hair dye: manufactured by Nakano Pharmaceutical Co., Ltd.)] to the human forearm or upper arm (1 square centimeter, 0.2 g) and leave for 15 minutes. did.

  The dye removal agent composition shown in Formulation Example 6 in Table 4 below is (1) foamed into various foam containers A to C and blended into the skin together with the hair dye. The operation of swallowing with strength was reciprocated 10 times and washed with water (removal methods 8 to 10), and (2) after washing the hair dye with water, the operation of impregnating absorbent cotton and wiping with constant strength was reciprocated 10 times. In the case (removal method 11), the dyeing removal and skin irritation were evaluated in the same manner as in Example 2.

  The results are shown in Table 4 below together with a formulation example (prescription example 6) and a removal method (removal methods 8 to 11) of the dyeing removal agent composition.

  As is apparent from this result, it can be seen that the foam removal effect obtained by foaming with the former containers A to C has a higher dye removal effect and suppresses skin irritation.

[Example 4]
Commercially available oxidative hair dye [first agent: “Caradeco NB / d-5 / 3” (oxidative hair dye: manufactured by Nakano Seiyaku Co., Ltd.), second agent: “caradeco oxide 06” (hydrogen peroxide oxidizer : Manufactured by Nakano Pharmaceutical Co., Ltd.), the mixing ratio of the first agent and the second agent 1: 1] was applied to the human forearm or upper arm (1 square centimeter, 0.2 g) and left for 30 minutes.

  A dyeing / removing agent composition (formulation example 7) prepared by blending various raw materials at the blending ratio shown in Table 5 below is (1) foamed with a former container A and applied to the skin together with the hair dye. Former container A when the operation of swallowing with a certain strength at the index finger's belly is reciprocated 10 times and washed with water (time until removal is 0 minutes), and (2) 1 minute after washing the hair dye with water. Then, when the foam is made into a foam and blended into the skin together with the hair dye, the operation of swallowing with a certain strength with the index finger's belly is performed 10 times, and (3) the hair dye is washed with water 5 After the minutes have passed, the foam container is made into a foam with a former container A and blended into the skin together with the hair dye, and the operation of swallowing with a certain strength with the index finger's belly is performed 10 times, followed by washing with water. The effect was compared. In other words, the dyeing removal effect is compared when the time between washing the hair dye with water and using the dyeing remover composition is changed from 0 minute (immediately), 1 minute, and 5 minutes later. (The evaluation method is the same as in Example 2).

  The results are shown in Table 5 below together with a formulation example (Formulation Example 7) of the dyeing remover composition and the time until removal.

  As is clear from this result, it can be seen that the shorter the time from removal of the hair dye to the removal of the dye, the higher the effect of removing the dye.

Claims (2)

(A) Nonionic surfactant and (B) Reducing agent, respectively, and dyeing the skin while discharging the foam remover composition used in the form of foam from the former container A method for removing dyeing, characterized by removing soil. The dyeing / removing method according to claim 1, wherein the dyeing / removing agent composition further contains (C) a penetrating agent and (D) an alkali agent .